Three cottons with fiber strength of 20.5, 20.9 and 22.2 g/Tex and having other important fiber properties approximately equal were selected. The cottons were processed on conventional processing equipment into 20/1, 30/1 and 40/1 yarn counts, using a range of twist multipliers of 3.4, 3.6, 3.8, 4.0, 4.2, 4.5 and 4.7. Yarn strength and elongation determinations were made on a pendulum-type tester of 150-300 lbs capacity. It was found that: 1 - High strength cotton produced stronger yarns than low strength for any given yarn count or twist; 2 - The amount of twist required to obtain maximum strength was not affected significantly by fiber strength; 3 - High fiber strength produced yarns with better elongation and 4 - The IAC 16 cotton variety yielded yarns of highest tenacity and elongation.
cotton; Gossypium hirsutum L.; fiber strength; twist; yarn strength; spinning; yarn count